JPS6376734A - Material for casting mold - Google Patents
Material for casting moldInfo
- Publication number
- JPS6376734A JPS6376734A JP22247886A JP22247886A JPS6376734A JP S6376734 A JPS6376734 A JP S6376734A JP 22247886 A JP22247886 A JP 22247886A JP 22247886 A JP22247886 A JP 22247886A JP S6376734 A JPS6376734 A JP S6376734A
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- mold
- compounding ratio
- binder
- molding sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005266 casting Methods 0.000 title abstract description 17
- 239000000463 material Substances 0.000 title description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims description 17
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000012778 molding material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 7
- 239000003110 molding sand Substances 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 230000007547 defect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は鋳型用材料に関する。[Detailed description of the invention] Industrial applications The present invention relates to mold materials.
従来の技術
従来の鋳型用材料は、鋳物砂（例えばクロマイトサンド
、ジルコンサンド等）に樹脂性粘結剤を加えて構成した
ものであった。そして、この鋳型用材料により鋳型を形
成した場合、溶乃による焼付き、さし込み等の鋳肌欠陥
を防止するため、溶場との接触面に耐火物を塗布してい
た。BACKGROUND OF THE INVENTION Conventional mold materials have been composed of foundry sand (for example, chromite sand, zircon sand, etc.) with a resin binder added thereto. When a mold is formed using this mold material, a refractory is applied to the surface in contact with the melt field in order to prevent casting surface defects such as seizure and insertion due to melting.
発明が解決しようとする問題点
上記従来の鋳型用材料によると、鋳型の溶湯との接触面
に耐火物を塗布しなければならず、塗布作業に手間がか
かるとともに、その乾燥に時向を要するという問題があ
った。Problems to be Solved by the Invention According to the above-mentioned conventional mold materials, it is necessary to apply a refractory to the surface of the mold that comes into contact with the molten metal, which is time-consuming and requires time to dry. There was a problem.
そこで、本発明は上記問題を解消し得るＱＪｊ型用材料
を提供することを目的とする。Therefore, an object of the present invention is to provide a QJj type material that can solve the above problems.
問題を解決するための手段
上記問題を解決するため、本発明の鋳型用材料は、骨材
をりん状黒鉛と鋳物砂とで（１，；成するとともに、そ
の配合割合をりん状黒鉛が５〜９９％（重ｆｆ１％）、
鋳物砂が残部としたものである。Means for Solving the Problems In order to solve the above problems, the molding material of the present invention consists of aggregates of phosphorous graphite and foundry sand (1,; ~99% (heavy ff1%),
The remainder was foundry sand.
作用
上記鋳型用材料によると、耐火度が高い燐状黒鉛と鋳物
に生じるガス欠陥を防止する鋳物砂とを混合させて骨材
を（（４成したので、鋳造時に焼付き等の鋳肌欠陥が生
じず、鋳型の溶場との接触面に塗型材を塗布する必要が
ない。Function: According to the above-mentioned mold material, the aggregate is made by mixing phosphorous graphite, which has a high degree of refractoriness, and molding sand, which prevents gas defects that occur in castings. There is no need to apply mold coating material to the contact surface of the mold with the melt field.
実施例 以下、本発明の一実施例について説明する。Example An embodiment of the present invention will be described below.
本発明に係る鋳型用材料は、骨材と粘結剤とから手、〕
Ｓ成される骨材の配合割合を、りん状黒鉛が５〜９９％
（重量％、以下同じ）、鋳物砂（例えばクロマイトサン
ド、ジルコンサンド、オリビンサンド、珪砂等）が残部
、すなわち１〜９５ｔＩ６の範囲内と成るようにしたも
のである。また粘結材の配合割合を、樹脂（例えばフラ
ン樹脂、フェノール樹Ｊ１ｉ１等）が上記骨材重量に対
して！−１０５ｉ、硬化反応液が骨材重量１こ対しで１
〜５％の範囲内となるようにしたものである。The mold material according to the present invention is made of aggregate and a binder,
The blending ratio of the aggregate made by S is 5 to 99% phosphorous graphite.
(% by weight, the same applies hereinafter), and foundry sand (for example, chromite sand, zircon sand, olivine sand, silica sand, etc.) is the balance, that is, within the range of 1 to 95 tI6. Also, the blending ratio of the caking agent (for example, furan resin, phenol resin J1i1, etc.) should be determined based on the above aggregate weight! -105i, the curing reaction liquid is 1 part by weight of aggregate
5%.
りん状黒鉛は、ｍ極、黒鉛レンガが主な用途であり、非
常に耐火度の高いものである。その成分を第−表に示す
。Phosphorous graphite is mainly used for m-poles and graphite bricks, and has a very high degree of fire resistance. Its components are shown in Table 1.
第−表
また、鋳物砂は厨ｊ大性の高い砂が選ばれる。特に、珪
砂は５Ｉ０２を９５％以上含むものがよい。Table 1: Sand with a high degree of strength is selected as the foundry sand. In particular, silica sand containing 95% or more of 5I02 is preferred.
次に、骨＋Ｌ３の配合割合の設定理由について説明する
。すなわち、りん状黒鉛が１００％であると、耐火度は
非常に高いが１通気性が悪くなるとともに、樹脂の添加
量を多く必要とするため、燃焼ガスが増加し、鋳物にガ
ス欠陥を発生させる。しかし、鋳物砂を１％以上混合さ
せることにより、上記欠点が解消される。また、鋳物砂
が１００％であると、耐火度不足となり、燃付きを防止
することはできない。その最大混合最は９５％であり、
それより多く混合すると焼付き現象が発生する。なお、
りん状黒鉛と鋳物砂の配合割合は鋳物の肉厚および熱量
に応じて決定される。Next, the reason for setting the blending ratio of bone+L3 will be explained. In other words, if phosphorescent graphite is 100%, the fire resistance is very high, but the air permeability is poor, and a large amount of resin is required, which increases combustion gas and causes gas defects in the casting. let However, by mixing 1% or more of foundry sand, the above drawbacks can be overcome. Moreover, if the foundry sand is 100%, the refractory resistance will be insufficient and it will not be possible to prevent burning. Its maximum mixing maximum is 95%,
If more than that is mixed, a seizure phenomenon will occur. In addition,
The mixing ratio of phosphorous graphite and foundry sand is determined depending on the wall thickness and calorific value of the casting.
この鋳型用材料によると、１４５０℃以下の鋳込温度で
あれば、塗型材無しの鋳型で鋳物を製作することができ
る。したがってこの鋳型を使用すれば、鋳造工程におい
て塗型作業及び鋳型乾燥工程が省略でき、鋳物製作コス
トの約２０％の低減が可能となる。また、それと同時に
塗型材が不要なため、材料を節約することができる。According to this mold material, if the casting temperature is 1450° C. or lower, a casting can be manufactured using a mold without coating material. Therefore, if this mold is used, mold coating work and mold drying process can be omitted in the casting process, making it possible to reduce casting manufacturing costs by about 20%. At the same time, since no coating material is required, materials can be saved.
ここで、具体例、すなわち大型舶用ディーゼル部品によ
る鋳込テストを行なった結果を第２表に示す。Here, Table 2 shows the results of a concrete example, that is, a casting test using large marine diesel parts.
なお、鋳込温度は１３８０’Ｏ以上で材質はＦＣＤ ４
５（ＪＩＳ）相当である。肉厚は最大１５０間で、鋳放
重舟は４５０ Ｙｚ である。また、各鋳物砂の粒度は
５号（ＪＩＳ）を使用した。さらに、粘結剤の添加割合
は他の配合材料に対して最適量となるように添加しｔこ
。The casting temperature is 1380'O or higher and the material is FCD 4.
5 (JIS) equivalent. The maximum wall thickness is 150 Yz, and the thickness of a cast barge is 450 Yz. Further, the particle size of each molding sand was No. 5 (JIS). Furthermore, the binder should be added in an optimum amount relative to the other ingredients.
第二表 ※粘結剤は対骨材割合である。Table 2 *Binder is the ratio to aggregate.
第二表から分かるように本発明に係るもの（テストピー
ス番号１〜６）については、焼付きが発生しなかったが
、りん状黒鉛が８％のもの（テストピース番号７）につ
いては、焼付きが発生した。As can be seen from Table 2, seizure did not occur with the products according to the present invention (test piece numbers 1 to 6), but with the product containing 8% phosphorous graphite (test piece number 7), seizure did not occur. A collision occurred.
発明の効果
上記本発明の鋳型用材Ｅｌによると、λ・Ｉ型のｆｔ＆
９との接融面に塗型材を塗布する必要がないため、塗型
作業および鋳型乾燥工程を不要にし得、製作コストの低
減化を図ることができ、また塗型材も必要がないため、
材料の節約を図ることができる。Effects of the Invention According to the above-mentioned molding material El of the present invention, λ・I type ft&
Since there is no need to apply mold coating material to the welding surface with 9, mold coating work and mold drying process can be eliminated, and production costs can be reduced, and mold coating material is also not required.
It is possible to save on materials.
さらに、上記の材料により製作された鋳型によると、塗
型材を塗布しないため、コーナ部が鮮明となり１文字等
の凸部が明確に鋳出される。また、冷却能力が優れてい
るため、鋳物中心部まで均一な組織が得られる。例えば
、球状黒鉛鋳鉄鋳物においては、通常鋳肌面から約０．
１ 間の厚さで餓細な片状黒鉛が発生するが、上記鋳型
の場合では、鋳肌面から直ちに黒鉛が球状化されていた
。Furthermore, according to the mold made of the above-mentioned material, since no mold coating material is applied, the corner portions are clear and convex portions such as single letters are clearly cast. Also, because of its excellent cooling ability, a uniform structure can be obtained right down to the center of the casting. For example, in spheroidal graphite iron castings, it is usually about 0.0 mm from the casting surface.
Fine flaky graphite is generated when the thickness is between 1 and 2 mm, but in the case of the above mold, the graphite was immediately spheroidized from the casting surface.
Claims (1)
その配合割合を、りん状黒鉛が５〜９９％（重量％）、
鋳物砂が残部としたことを特徴とする鋳型用材料。1. The aggregate is composed of phosphorous graphite and crushed cast metal,
The blending ratio is 5 to 99% (weight%) of phosphorous graphite,
A molding material characterized by having foundry sand as the remainder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22247886A JPS6376734A (en) | 1986-09-19 | 1986-09-19 | Material for casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22247886A JPS6376734A (en) | 1986-09-19 | 1986-09-19 | Material for casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6376734A true JPS6376734A (en) | 1988-04-07 |
Family
ID=16783047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22247886A Pending JPS6376734A (en) | 1986-09-19 | 1986-09-19 | Material for casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6376734A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197042A (en) * | 1988-01-29 | 1989-08-08 | Aisin Takaoka Ltd | Mold |
| JP2008174387A (en) * | 2007-01-22 | 2008-07-31 | Xerox Corp | Alignment gate for multi sheet inserter tray |
-
1986
- 1986-09-19 JP JP22247886A patent/JPS6376734A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197042A (en) * | 1988-01-29 | 1989-08-08 | Aisin Takaoka Ltd | Mold |
| JP2008174387A (en) * | 2007-01-22 | 2008-07-31 | Xerox Corp | Alignment gate for multi sheet inserter tray |
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